Effect of Red Mud Particles on Microstructures and High-Temperature Tensile Properties of Al-5.4Cu-0.7Mg-0.6Ag Alloy

Abstract The Ni-coated red mud/Al-5.4Cu-0.7Mg-0.6Ag-based composite materials were fabricated by gravity casting, and the Ni-coated red mud particles were prepared via chemical deposition. The effect of the content of nickel-coated red mud particles on the microstructures and high-temperature tensile properties of these composites was analyzed. The results demonstrate that the addition of trace amounts of Ni-coated red mud particles effectively refines the Ω precipitates, reducing their average